A person pushes a box across a horizontal surface at a constant speed of 0.5 meter…
PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
4. A person pushes a box across a horizontal surface at a constant speed of 0.5 meter per second. The box has a mass of 40 kilograms, and the coefficient of sliding friction is 0.25 . The power supplied to the box by the person is
(A) 0.2 W
(B) 5 W
(C) 50 W
(D) 100 W
(E) 200 W